Method of producing an oscillating weight for automatic timepieces
AssigneeETA A.G. Ebauches-Fabrik
InventorsUrs Giger, Friedrich Perrot
Life of this patent
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Abstract
A method of producing an oscillating weight for an automatic wristwatch. The oscillating weightcomprises a heavy-metal segment and a metallic center portion having a flanged rim. For attaching the center portion to the heavy-metal segment, an arcuate groove is formed in the upper surface of the segment, the flanged rim of the center portion is axially inserted in the groove which is slightly wider than the flanged rim, and at one or more locations a portion of the segment is wedged over the rim or a portion of the rim is wedged in the groove by exerting a localized pressure substantially at right angles to the plane of the center portion.
Claims5
In a method of producing an automatic timepiece oscillating weight of the type comprising a heavy-metal segment and a metallic center portion having a flanged rim, wherein an arcuate groove is formed in the upper face of the segment adjacent to the periphery thereof, the flanged rim of the center portion is axially inserted in the groove, and portions of the segment and of the flanged rim are wedged together at at least two mutually spaced spots for rigidly connecting the center portion to the segment, the improvement comprising the steps of:
- forming the groove slightly wider than the flanged rim to be inserted therein for facilitating assembly, and
- wedging the segment portion over the rim portion or the rim portion under the segment portion by means of localized pressure exerted substantially at right angles to the plane of the center portion.
Dependencies are inferred from the claim text.